As the question says, does anyone know what a fos-prmoter is and how does it differ from e.g. minimal promoters? I guess that both promoters contain elements that are necessary for basal transcription, but again, what is the difference?

I am also wondering what SV40 late pA has for function My theory is that SV40 possesses the activity of transcription termination and can add PolyA tail to mRNA.